Open AccessInfluence of abscisic acid and other plant growth regulators on citrus defense mechanisms to salt stress
Author(s) -
Vicent Arbona Mengual,
M.L. Foó Serra,
P. Marín,
A.J. Marco Casanova,
Josep Anton Jacas Miret,
Aurelio Gómez Cadenas
Publication year - 2003
Publication title -
spanish journal of agricultural research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.337
H-Index - 36
eISSN - 2171-9292
pISSN - 1695-971X
DOI - 10.5424/sjar/2003011-9
Subject(s) - abscisic acid , jasmonic acid , abscission , salinity , ethylene , horticulture , photosynthesis , 1 aminocyclopropane 1 carboxylic acid , acclimatization , biology , botany , methyl jasmonate , chemistry , salicylic acid , biochemistry , ecology , gene , catalysis
Citrus yield and growth are deeply affected by salinity. In the present work we have studied the effectiveness of differentplant growth regulators such as abscisic acid, jasmonic acid and 8-methylene methyl abscissate in protectingcitrus from salt-induced damage. Plants of Salustiana cultivar grafted onto Carrizo citrange were used for this purpose.Plants were watered with 100 mM NaCl and leaf abscission, ethylene production, chloride accumulation and net photosyntheticrate were measured. Non-treated plants showed a dramatic drop in photosynthetic activity in response tosalinity, an increase in leaf ethylene production and a high abscission rate as a result of a massive leaf chloride accumulation.Plants treated with jasmonic acid or 8-methylene methyl abscisate did not show any physiological changein response to salt stress. However, plants treated with abscisic acid showed a high reduction in the parameters considered.These results suggest that abscisic acid plays a role in modifying citrus physiological behaviour in responseto salinity and could be helpful in their acclimation to saline conditions